The interface between two crystals in a polycrystalline single phase solid is a(n) _____________boundary.
Fill in the blank(s) with the appropriate word(s).
grain
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Just as some chemicals must be given activation energy to start an exothermic chemical reaction, some nuclei must be given nuclear activation energy in order to undergo an exothermic fission
What will be an ideal response?
If iron with 4.26 weight percent carbon is cooled to room temperature in a normal manner from the melting temperature, it is called _________cast iron.
Fill in the blank(s) with the appropriate word(s).
A rectangular loop of wire carrying a 4.0-A current is placed in a magnetic field of 0.60 T
The magnitude of the torque acting on this wire when the plane of the loop makes a 30° angle with the field is measured to be 1.1 N ? m. What is the area of this loop? A) 0.20 m2 B) 0.40 m2 C) 0.26 m2 D) 0.80 m2 E) 0.53 m2
Two balls of different material, but the same radius, ball A and ball B, float on the surface of a pool filled with fresh water of 1000
density. If ball A has 45% of its volume above the water, and ball B has 55% of its volume above the water, what is the ratio of the mass of ball A to that of B?
A. 0.905 B. 1.07 C. None of these D. 1.22 E. 0.82 F. 0.935